The list author says: "So you have decided you want to take the GMAT, and need to score a 700 or higher. The next step is to get the right resources that will help you hit and surpass that 700 mark. These books will provide you a really in-depth view of the test, and what you need to know for the verbal and quantitative sections to get a 700 or higher score. These books focus a lot on test strategies and practice tests. This list is highly recommended for the serious test taker."
"Integrates online and book learning. A real-time online classroom including audio, video, instant chat, whiteboards, screen-sharing. 5 Full Interactive GMAT Tests, and 20 question quizzes added monthly. Online tests are available for 6 months only."